76 Dodge Dart 225 318 conversion

What is the 318 'IN"? If it's an A body it "might" be a parts hoard

I would consider finding out how much the K member is going to cost, at least IF it's an A. And if it has disk brakes, get the whole K complete AND GET the upper control arms

I hope you got the 318 transmission, as the /6 bell pattern is different